Whip roll counterbalance



y F. J. HAGEN 2,240;s4s

WHIP ROLL COUNTERBALANCE I Filed April 7, 1939 2 Sheets-Sheet i Fred:ZJfagem,

3% WQQ F. J. I-IIAGEN 2,240,646

.WHIP ROLL COUNTERBALANCE Filed April 7 1939 2 Sheets-Sheet 2 I'r ed (ffagen,

Patented May 6, 1941 'UNiTED 'TAT S PATET GEFIQE WHIP ROLLCQUNTERBALANCE Fred J. Hagen, Crichton, Ala.

Application April 7, 1939, Serial No. 266,640

2 Claims.

This invention relates to let-off devices for looms, particularly whiprolls. Specifically, the invention resides in providing a counterbalancefor a whip r011.

In developing the invention, it was found that,

' as partially to overcome the vibrator rod spring.

The excessive tension on the warp yarns resulted in a narrowing of thefabric,'and decrease in the diameter of the warp yarn. It is thereforean object of the invention to decrease the amount of extra tensionnecessary to compress the vibrator rod spring. V

In providing a counterbalance for a whip roll, it is also an object toallow the use of a correspondingly weaker vibrator rod spring, and thusto decrease wear on the harness eyes, jumping of beams when the warp islow, and wear on the machine parts.

It is also intended toprovide a counterbalance which may be readilyattached either to right or left-hand looms of the standard types, andwhich may be easily tested and adjusted to suit different warp yarns.

These and other objectives, such as the provision of a counterbalancewhich is low in original cost, simple in operation, and easy tomaintain, will be apparent from the following specification anddrawings, in which:

Fig. 1 is a side elevation of the device;

Fig. 2 is a plan view;

Fig. 3 is a vertical section along the line 33 of Fig. 2;

Fig. 4 is a vertical section along the line 44 of Fig. 1, and 4 Fig. 5is a side elevation of the device as installed on a loom.

Referring particularly to Figs. 1 to 4, inclusive, the weight arm 2,which is laterally oifset as indicated at 4, is provided with a hub 6having sets 8 and ID of teeth. The free end l2 of arm 2 is notched onits upper and lower sides l4 and I6.

Numeral I'I indicates the counterweight, which is adjustably mounted onthe weight arm 2 by means of the pin l8 which extends through thecounterweight and through one of the slots [4, as best shown in Figs. 3and 4, and by the set screws 22 and 24 which extend through the threadedholes 25 in one side of the counter- Weight 11.

Because of the offset portion 8 of the weight arm two sets 8 and Id ofteeth on the hub 6, and the sets l4 and it of notches on the upper andlower sides of the free end I 2 of weight arm 2, the counterbalance maybe mounted on either the right or left-hand side of a loom withoutinterfering with adjacent loom parts. When mounted, the counterweight Ilmay be adjusted by loosening set screws 22 and 24, and moving the weightalong the free end l2 of the arm 2. The pin l8 engages in the notches i4and holds the weight temporarily until the set screws 22 and 24 areagain tightened to engage arm 2 as shown at 28.

Fig. 5 shows the device mounted for operation.

In one end of the loom frame 39, the warp beam 32 "holds warp threads 34which are passed over the whip roll 3%. The whip roll 33 is supported ateach end in the usual manner by a pair of arms 38 secured to the shaft3&3 by collars 49. As shown in Fig. 5, the shaft is rotatably supportedby the loom frame 36. On one end of the shaft 39 is mounted the whiproll lever 42; which is secured tightly against the collars 40 by thenut 4|, and has the whip roll lever plug 44 pivoted at its lower end,through which the vibrator rod 46 passes. Preventer spring collar 48holds one end of the vibrator rod spring 49, the other end being'abuttedby the member 58. The vibrator rod 46 passes through the member 58, and,as shown at 5|, engages thecontrol lever 52 operatively connected to thepallet lever 54 and pallet 56.

The loom may be either of the type in which the whip-r011 is positivelymoved by a let-off motion transmitted upwardly through the vibrator rodand wherein a retroactive control movement is transmitted back throughthe vibrator rod spring to control the amount of letoff for the warpbeam in accordance with the tension of the warp on the whip roll, or itmay be of the type in which the whip roll is moved only by the warp.

The hub 6 of the Weight arm 2 is attached by removing unit 4|, removingthe whip roll lever 42, and by inserting the hub over shaft 39 betweenthe lever 42 and collar 48. The teeth 8 bear against the inner face ofthe upper end of the lever 42 and against the collar 40 and thus preventrelative rotation between the weight arm 2 and. the lever 42.

When installing the counterbalance on looms previously in use,- the oldvibrator rod spring should be replaced by one substantially weaker.

As may be seen in Fig. 5, the counterbalance exerts a force inopposition, to the tension of the yarn against the whip roll 36. Theweight of the whip roll itself, plus the Weight of the supporting parts,and the whip roll lever also exert a force which must be overcome by thespring 49. Since, because of the counterbalance, the tendency of theseparts to swing downwardly against the spring 49 is less, the vibratorrod spring need not be of as great initial strength as without thecounterbalance. In the weaker spring, the ratio of increase in necessaryforce to move it between maximum extended and maximum compressedconditions is not as great as with the former, initially strongerspring. In result, there is relatively little difference in the tensionof the warp yarn between its normal condition and the let-off periods.

In actual operation, use of the counterbalance hasresulted in anincrease of approximately 3000 more picks per eight hour day than beforewith the same loom. The cloth is a full one quarter of an inch wider,and the warp yarn may be made from single creel roving where doublecreel roving was previously required. By approaching uniform tension atall times, incorrect setting of the let-off motion is compensated for.

While I have described herein some embodi ments of my invention, I wishit to be understood that I do not intend to limit myself thereby exiceptwithin the scope of the appended claims.

I claim:

1. In a whip roll mechanism for a loom having a whip'roll supportedadjacent the outer ends of a pair of arms connected to a shaft at theinner ends of said arms, said shaft being supported on the frame of saidloom, a lever on said shaft, and a spring operatively engaged againstthe free end of said lever for resiliently holding said whip rollagainst the warp yarn of said loom and adapted to be compressed duringthe warp yarn let-oil motion of said loom; a counterbalance, saidcounterbalance being adapted and arranged to force said whip rollagainst said Warp yarn in supplement to said spring, and comprising aweight arm, means on one end of said weight arm for securing the same tosaid shaft, a counterweight adjustably secured to the other end of saidweight arm, and means for adjusting the position of said counterweightalong said weight arm, said weight arm being laterally offsetintermediate its length, the first-mentioned means comprising a hub, andteeth on the faces of said hub adjacent the opening thereof, thesecondmentioned means comprising a series of teeth along the upper andlower edges of said rod whereby said counterbalance may be used foreither right or left-hand looms, said counterweight having an openingthrough which said weight arm is slidable, and a pin across said openingwhereby said counterweight may temporarily be held on said weight armduring adjustment, and set screws threadedly engaged with saidcounterweight and engageable against said weight arm.

2. In a whip roll mechanism for a loom having a whip roll supportedadjacent the outer ends of a pair of arms connected to a shaft at theinner ends of said arms, said shaft being supported on the frame of saidloom, a lever on said shaft, and a spring operatively engaged againstthe free end of said lever for resiliently holding said whip rollagainst the warp yarn in said loom and adapted to be compressed duringthe warp yarn let-ofi motion of said loom; a counterbalance, saidcounterbalance being adapted and arranged to force said Whip rollagainst said warp yarn in supplement to said spring, and comprising aweight arm, means on one end of said Weight arm for securing the same tosaid shaft, a counterweight adjustably secured to the other end of saidweight arm, and means for adjusting the position of said counterweightalong said arm, said weight arm being laterally offset intermediate itslength, the first-mentioned means comprising a hub, and teeth on thefaces of said hub adjacent the opening thereof whereby saidcounterbalance may be used for either right or left-hand looms.

FRED J. I-IAGEN.

